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Innovative Hearth Products
DRT4200 Series Direct-Vent Gas Fireplaces
BTU Input
Table 1 - Input Rate (BTU/HR), Gas Valves
Table 2 - Thermal Efficiency (%)
* AFUE is a measurement of the US Department of Energy, ** P4 (EnerGuide) is a
measurement of the Canadian Office of Energy Efficiency.
Efficiencies are based on Normal input operation.
Gas Pressure
Table 3 - Inlet Gas Supply Pressure
Table 4 - Manifold Gas Supply Pressure
Test gauge connections are provided on the front of the electronic gas control valve (identified IN for the inlet and
OUT for the manifold side). The control valves have a 3/8" (10 mm) NPT thread inlet and outlet side of the valve
(Figure 1).
Figure 1 - Gas Valves
Ecoflow Electronic Gas Valve
Propane tanks are at pressures that will cause damage to valve components. Verify that the tanks have step down
regulators to reduce the pressure to safe levels.
Models
40" Models
45" Models
Model
AFUE *
40" Models
45" Models
Fuel
Natural Gas
Propane
Fuel
Natural Gas
Propane
Natural Gas
High Rate
Low Rate
36,000
24,000
42,000
25,000
Electronic
P4 **
67
60
67
65
Minimum
5" WC (1.25 kPa)
11.0" WC (2.74 kPa)
General Information
900636-01, 01/2017
Propane Gas
High Rate
Low Rate
31,000
21,000
41,000
22,000
Maximum
10.5" WC (2.61 kPa)
13.0" WC (3.23 kPa)
Pressure
3.5" WC (0.87 kPa)
10.0" WC (2.49 kPa)
9
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